Inspired by this photo I found on a blog linked to Flickr, I decided to try out some photos of eggshells, sans concept. So I wasted an egg (sorry, I know, I should have eaten it, or saved it, but I wasn't hungry and I'm lazy), set up the shell next to my large windows in the afternoon light on my blue tile floor and took some photos.
Here are two of them, the second one processed two different ways. I was just mousing over presets in Lightroom, and I liked this one that turned the eggshell white. Honestly, I'm not even sure what settings the preset changed, but I liked the effect. Think I like the original better, but it's always fun to try different options out.